Using logarithm, the following equation will apply: Y = P * [1 + z]^x Where Y = 2000 P = 100 z = 5% = 0.05 x is the quantity we are calculating for The equation becomes 2000 = 100 * [1+ 0.05]^x Dividing both side by 100, we have 20 = 10 * [ 1 + 0.05]^x Taking the log of both sides, we have Log 20 = Log [1 + 0.05]^x log 20 = x * log 1.05 x = log 20/ log 1.05 = 61.40 Thus, it will takes 61.40 minutes for the number of cells in the petri dish to reach 2000.
